Holding device for cogs.



W. JENKINS.

HOLDING DEVICE FOR COGS.

APPLICATION FILED AUG, 29, 1910.

Patented Mar. 18, 1913.

2 SHEETS-SHEET 1.

W/TA/fSSfS COLUMBIA PLANOGRAP" cm, WASHINGTON, D. c.

view of the gear blank.

WILLIAM JENKINS, OF MEAFORD, ONTARIO, CANADA.

HOLDING DEVICE FOR COGS:

Specification of Letters Patent.

Patented Mar. 18, 1913.

Application filed August 29, 1910. Serial No. 579,427.

T 0 all whom it may concern Be it known that LVVILLIAM JENKINS, of thetown of Meaford, in the county of Grey, in the Province of Ontario,Canada, have invented certain new and useful Improvements in HoldingDevices for Cogs, of which the following is the specification.

The present. invention relates to improvements in holding devices forcogs or gear teeth, and consists in providing a device by means of whichthe bevel or angle at which the cog or tooth to be cut is accuratelygaged, and the blank held in such set position while being out.

Another object of the invention is to provide a device for cuttingangular recesses in the same blank that will serve as key seats insecuring the cog or gear tooth into the hub of the wheel.

The arrangement and construction of parts is more particularly explainedand set forth in the following specification.

Figure 1, is a general perspective view of my device. Fig. 2, is asimilar view to Fig. 1 partially broken away and in section to moreclearly exhibit the construction of my device. Fig. 3, is a crosssectional view on line w y, Fig. 1. Fig. 4:, is a detail of one of theadjustable members for support* .ing the cog blank while cutting thetenon. Fig. I), is a similar view to Fig. 4 showing a similar device forcutting thin teeth. Fig. 6, is a perspective view of a blank from whicha cog is cut. Fig. 7, is a perspective view of a cog when out. Fig. 8,is a plan view of a saw table. Fig. 9, is an end Fig. 10 is a sectionaldetail showing the spring plunger employed in my device it beingunderstood that the outer end of the spring plunger D extends when themachine is in operation into the groove A in the guide block.

In the drawings like letters of reference indicate corresponding partsin each figure.

A is a saw table provided with a guide block A having guide grooves Aand A B is my gage device comprising the rear rectangular hollow baseportion 13 and a forwardly extending portion 13 My device B is supportedon suitable rollers B (see Fig. The rollers B3 are suitably journaled inthe bottom of the portions B and B of my device.

13* and B are handles by which the device is moved longitudinally overthe saw table toward the saw in a direction parallel.

of the base portion of my device as inclicated in F 1g. 2 ot thedrawing.

C are tongues secured upon the studs C by set screws 0*. The tongues Ctravel in the groove A as my device B is carried over the saw table in abackward or forward direction.

To hold the device down to its work I provide spring plungers D designedto enter the groove A of the guide block A. The spring plunger Dcomprises a, plunger rod D slidably held in the sleeve D having an endnotch D indicated by dotted lines in Fig. 10. The plunger rod D isprovided with a laterally extended pin D extending into the notch D Theinner end of the plunger rod D extends into the recess D formed in theforwardly extending portion B of the body of the machine.

D is a compression spring held in the recess D against the inner end ofthe plunger rod D. The opposite end of the plunger rod D is providedwith a cross groove D WVhen it is desired to place the-machine in asuitable case or when for any reason it is desired that the plunger rodD does not extend beyond the face of the portion B I insert ascrew-driver or other suitable instrument into the groove D of the rod Dforcing the rod inwardly against the com pression spring D so as tocarry the pin beyond the end of the sleeve D The plunger rod is thengiven a quarter turn so as to carry the pin D out of alinement with thenotch D to bear against the end of the sleeve. By this means it will. beseen that the device will be held down to the table as it moves in aback and forward direction.

I will first describe the mechanism by which the blank is held so thatthe tenon may be cut by the saw as my device is reciprocated on the sawtable.

F is a casting provided with standards F F and F F is aplate which isswivel-ed on a stud F on the lower horizontal portion of the casting F.At each end the plate is provided with arc-shaped slots F concentric tothe center of the stud F.

F are clamping nuts extending through the slots F 6 into the horizontalportion of the casting F. By this means the plate F 4 may be swunghorizontally to any angle and secured.

F is a vertical plate hinged to the plate F 4 by cross bolts F F areslotted hinged arms provided at each end of the plate F through theslots of which set screws F 11 extend into the standards F and F By thismeans when the plate F 4 is swung horizontally it may be held at anyangle by means of the clamping set screws,'F To hold the plate F at anyvertical angle I provide the slotted hinged arm'F through the slot ofwhich the set screw F extends into the center standard ber G and aslidable member G (see Fig. 4).

The member G is provided with rearwardly extending lugs G and-Gr havingorifices G The member G is slidably held behind the member G and isprovided with a forwardly extending lug G provided with a threadedorifice G The upper end of the member G is provided with a guide tongueG and a supporting tongue G extending through the notch G formed in themember G. By moving the screws 2 and 8 in the slots 2 and 3 the devicemay be adjusted to any angle desired.

G is athreaded spindle extending loosely through the orifice (i andthreaded through the orifice G". The spindle is provided with a knurlednut G By rotating the nut G and the spindle Gr the lug G will begradually carried upwardly by the spindle carrying with it the member Grprovided with the tongue G It will be understood that when the blank 6is placed in positlon the shoulders G and G rest upon the tongues G. Theplate F is then adjusted so as to incline backwardly toward the bottomof the machine in the position to cut the tenon, that is the cut 7 7indicated by dotted lines in Fig. 9. When this cut has been made theplate F is inclined in such a direction as to allow of the out 7 7 beingmade to form a key seat in main body or shank of the cog. To accomplishthis the cog is placed in the machine in the dotted position shown inFig. 3 of the drawing. I will now describe the operation by which thecog in this position is held during the cutting of the slab.

H is a face plate of the main portion of the machine comprising arectangular hollow portion H having a longitudinal extension H extendingalong the front of the portion B of the machine.

H are lugs extending from each end of the portion H and H" are screwspindles. On referring to Fig. 3 of the drawing it will be noticed thatthe rear of the hollow portion H of the machine is inclined at B B arescrew studs (see Fig. 3) extending into the portion B and forming astandard.

B is the tilting plate pivoted on the standard B centrally of itslength. Each end of the plate is provided with a reduced portion B B areclevises extending over the ends of the portion B and pivoted theretoand into which the screw spindles H extend.

H is a plate having a hinge connected with the plate B.

H is a hook bar pivotally located in the groove H formed in the base of.the machine. The hooked end of the bar extends upwardly through anorifice H into contact with the plate H serving to support the plate.

H is a plate pivotally connected at H to the plate H The plate inclinesdownwardly from its pivot point toward the plate B and then extendsupwardlythrough a slot H formed in the plate H and is pro vided with ahorizontal extension H.

J are slots formed at each end of the portion B of the machine.

J is a cross bar extending through the slots J over the plate H Thecross bar J may be clamped in any position in the slots J by means ofwing nuts J 2 threaded on to the ends thereof.

K and K are adjustable plates provided with vertical slots K and knifeedges K designed to grip the ends of the cog beneath the shoulders 6 and(5 The plate K is supported upon a supplemental plate K having alongitudinal slot 1'.

K are a series of holes formed in the face plate H and into which thethreaded studs K extend so as to provide means for adjusting the plate Klongitudinally.

L is a supplemental plate pivot-ally connected at L to the plate B.

L is a vertical movable bar provided with a series of holes L into whichthe pin L extends. The bar L is provided with a vertical slot L throughwhich extends the pin L from the body of the machine.

L is a pull bar provided with an inclined slot L through which the pin Lalso passes.

The slotted end of the pull bar is provided with an inclined portion Lupon which the roller L journaled at the upper end of the bar If rides.

L is a pull handle forming part of the pull bar and L is a compressionspring held upon the reduced portion L of the pull bar L between the lugL and the body of the pull bar. Then it is desired to cut, the slab offto form the tenon portion the cog is placed in the machine in theposition shown in Fig. 3 of the drawings. The bar J and plates B and Lare then adjusted to clamp the cog in the required inclined positionhorizontally corresponding to the required longitudinal bevel of thecog.

It will be seen that as the device passes over the saw table the 'end ofthe hook bar H supports the hinged plate H and consequently the slab.When the slab has been severed from the cog and the gage device passesover the end of the saw table the bar H" drops on its hinge allowing theplate H to drop. As the plate H drops the plate H strikes the interiorof the hollow portion B so as to carry the vertical portion of the plateH and the portion H against that end of the slab next the head of thecog or at the top of the tenon giving it a slight blow suflicient tofree that end of the slab from the tenon after the slab is severed bythe saw. Simultaneously the pull bar L is released releasing the outerend of the slab.

The next operation I will describe is to cut the longitudinal taper ofthe tooth. I first remove the casting F and the parts attached theretoby loosening the bolt M and slipping the horizontal portion of thecasting F from beneath the block M The machine is then arranged as shownin Fig. 2 of the drawings. The extension H hereinbefore described isprovided with a series of sharpened spikes M. The portion B is providedwith a slotted plate M set in a recess M and provided with overhangingsides M M is a block swiveled to the portion 13 by a suitable bolt Mhaving a square nut M fitting the slot of the plate M. The block M isprovided with a vertical plate M against which the side of the cogbears, the plate being provided with a stop M against which the end ofthe cog abuts. The block M is swiveled on the bolt M so that it may beadjusted to any horizontal angular position. In cutting the bevel of thecog the head of the cog is placed on the extension H so as to be grippedby the spikes or projections M and so that the inside face of the cogbears against the plate M and the end of the cog against the stop M Itwill of course be understood that the bolt M may be adjustedlongitudinally in the slotted plate M so as to allow of cutting any sizeof cog.

N is an adjustable plate provided with slotted projections N through theslot of which set screws N extend into the block M. By means of theslots N the plate may be adjusted so as to bear against the tenonportion of the cog and support the same while the longitudinal bevel isbeing out. To cut the bevel O at each side at the head of the cog Iplace the cog on the sharpened upper edge of the plate Iv abutting thestop block 0 and resting against the plate N in an inclined position. Inthis position the bevel O is cut.

To prevent the device from traveling too fast over the saw I provide abrake plate 0 secured to the bottom of the device.

is a screw spindle bearing against the brake plate so as to adjust thetension or frictional contact of such brake plate against the surface ofthe saw table.

0 is a stop which by coming in contactwith the end of the saw tableguide block prevents the device sliding off the saw table when in aninclined position and not in use.

Each of the devices Gr hereinbefore described may be provided with asupplemental block 0 provided with a lug 0 through which the spindle Galso extends and a pin 0 fitting into a corresponding hole in the memberG. By means of this block it will be readily seen that a thinner cog maybe cut by reason of its holding the cog farther over toward the saw thanwould otherwise be the case.

It will of course be understood by referring to Figs. 1 and 3 that thebracket F is removed from the device before such device is used as shownin Fig. 2 for cutting the longitudinal taper and bevel of the tooth.

V is a saw dust guard designed to prevent sawdust interfering with therollers E From this description it will be seen that I have devised amachine by which bevel cogs may be held in various positions, so thatall the cuts necessary to form such bevel tooth may be made by acircular saw and by which all sizes of blanks from which various sizesof teeth are cut may be held.

What I claim as my invention is:

1. In a gage device for cutting wooden gear teeth, the combination withthe saw and saw table, of a base block mounted on suitable rollers,guides for the block arranged so that the block travels parallel withthe face of the saw and a vertical holding pocket for the gear blankconnected to the side of the block so that the blank held therebyoverhangs the saw and means for adjusting the pocket to any desiredvertical or horizontal incline as and for the purpose specified.

2. In a gage! device for cutting wooden gear teeth, the combination withthe saw and saw table, of a base block mounted on suitable rollers,guides for the block arranged so that the block travels parallel withthe face of the saw, a horizontal plate swung on a vertical centralaxis, a vertical plate hinged at the bottom to the edge of thehorizontal plate next to the saw and adjustable members forming a pocketsecured to the vertical plate so as to hold the blank in a positionoverhanging the saw.

3. In a gage device for cutting wooden gear tooth blanks, thecombination with the slidable base block, the hinge plate, and means foradjusting the angular set of the plate, of pocket members. for holdingthe blank comprising bars adjustably secured to the plate andsupplemental bars longitudinally adjustable on the aforesaid bars and soarranged as to extend beneath suitable portions of the gear tooth blankto support the same.

4. In a device of the class described, the combination with the slidablebase block, the hinged plate, and means for adjusting the angular set ofthe plate, of pocket members comprising a bar adj ustably secured toeach end of the plate, supplemental movable bar members connected toeach of the aforesaid members and longitudinally adjustable in relationthereto, and so positioned as to engage the gear blanks at their upperend, as and for the purpose specified.

5. In a device of the class described, the combination with the slidablebase block, the hinged plate, and means for adjusting the angular set ofthe plate, of pocket mem bers comprising a stationary bar adjustablysecured to each end of the plate and each bar having a rearwardlyextending lug having an orifice, supplemental movable bar members eachhaving a forwardly extending lug having a threaded orifice and athreaded spindle extending loosely through the orifice of eachrearwardly extending lug, and threaded into the threaded orifice of eachforwardly extending lug, as and for the purpose specified.

6. In a gage device for cutting wooden gear teeth, the combination withthe slidable base block, of a horizontal base plate extending from thebase block, a plate swiveled centrally to the aforesaid plate and havingits outer edge coinciding with the outer edge of the base block plate,the swiveled plate being adjustably connected to the base plate at eachend, a vertical plate hinged at its lower edge to the outer edge of thecentrally swiveled plate, slotted plates hinged to each end and to thecenter of the edge of the main hinged plate and set screws connectingsuch hinged plates to suitable portions of the base block.

7. In a gage for cutting wooden gear tooth blanks, means for holding thebeveled gear tooth blank while cutting the slab therefrom, comprising ahollow rectangular base block supported on suitable rollers and havingvertical slots at each end thereof, and

fsuitable operating handles, a rod adjustably held within the slots anda blank supporting table located beneath the rod and means for adjustingthe angular position of the rod and table as and for the purpose speci-8. In a gage for cutting wooden gear tooth blanks, means for holding thebeveled gear tooth blank While cutting the slab therefrom, comprising ahollow rectangular base block supported 011 suitable rollers and 'meansfor temporarily supporting the table -while cutting the slab and forautomatically releasing the table after cutting the slab, so as todischarge the same, as and for the purpose specified.

9. In a gage for cuttlng wooden gear tooth blanks, means for holding thebeveled gear tooth blank while cutting the slab therefrom, comprising ahollow rectangular base block supported on suitable rollers and havingvertical slots at each end thereof, and a suitable operating handle, arod adjustably held within the vertical slots a vertical plate piv otedcentrally to the base blank and means for adjusting the ends of theplate, so as to vary the angle thereof, a hinged table connected to theplate, means for temporarily support-ing the table while cutting theslab and for automatically releasing the table after the cutting of theslab, so as to dis charge the same, a supplemental plate hinged to theaforesaid vertical plate, a spring pull plunger, and means for carryingthe free end of the plate into contact with the blank, as and for thepurpose specified.

10. In a gage for cutting wooden gear tooth blanks, means for cuttingthe longitudinal taper of the bevel tooth blank comprising a base blockprovided with an upper gripping surface, a swivel block supported on thebase block and provided with a face plate forming a groove in which theupper edge of the blank rests and having a stop at one end thereof and alaterally ad.- justable plate secured to the block and against which thetenon portion of the blank rests in an inclined position, as and for thepurpose specified.

11. In a gage for cutting wooden gear tooth blanks, a key holdingmechanism comprising a base block having a. suitable gripping surface, astandard secured to the base block, a lower gripping member connected tothe standard plate, a pull bar, means for raising the lower grippingmember so as to tilt the key supported thereby and an upper grippingmember and pull bar, means for forcing such gripping member in contactwith a key when held in the aforesaid tilted position as and for thepurpose specified.

12. In a gage device for cutting wooden gear teeth blanks, means forholding the bevel gear blank while cutting the slab therefrom,comprising a hollow rectangular base block having vertical slots at eachend thereof, a rod adjustably held within the slots at each end, a blanksupporting table located beneath the rod, means for adjusting theangular position of the rod and the table, and means for temporarilygripping the blank during the cutting of the slab.

13. In a gage device for cutting wooden gear teeth blanks, means forholding the bevel gear blank while cutting the slab therefrom,comprising a hollow rectangular base block having vertical slots at eachend thereof, a rod adjustably held at each end in the slots, a verticalplate pivoted centrally to the block, means for adjusting the ends ofthe plate in a vertical plane, a blank supporting table hinged to theplate and extending into the hollow portion of the block, means forsupporting the table in a horizontal position and designed to bereleased after the slab is cut from the blank.

14. In a gage device for cutting Wooden gear teeth blanks, means forholding the bevel gear blank while cutting the slab therefrom comprisinga hollow rectangular base block, a vertical plate pivoted centrally tothe block, means for adjusting the ends of the plate in a verticalplane, a blank supporting table hinged to the plate and extending intothe hollow portion of the block, a bar extending longitudinally over thetable and angularly adjustable, a supplemental plate hinged at one endto the vertical plate, a pull bar, and connecting means between the pullbar and plate designed to force the same against the blank.

15. In a gage device for cutting Wooden gear teeth blanks, means forholding the bevel gear blank while cutting the slab therefrom comprisinga hollow rectangular base block, a blank supporting table hinged in thehollow portion of the block and having a longitudinal slot therein,means for adjusting the angular set of the table, an inclined platehinged beneath the table and extending through the slot, a bar extendinglongitudinally on the table and means for adjusting the angular set ofthe same.

WILLIAM JENKINS.

Witnesses:

W. T. ALLAN, JOHN ROSE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. O.

